Why are only 5 episodes of a FOX show available on FOX NOW?

In general, all episodes of current season FOX shows are available to watch live and on demand on the FOX NOW app for users with a TV provider once a show has started airing in your time zone. Without a TV provider, new episodes of returning FOX shows (i.e., shows that have been on the air more than 1 season), unlock 8 days after they air on TV. In some cases, only the most recent 5 episodes will be available, in which case when a new episode airs, the oldest of the 5 will be removed and the same cycle will occur when the next episode airs.

Episode availability differs show-by-show, so it's best to check the show page either on Fox.com or on the FOX NOW app, to see how many episodes are available.